Mr. Bonann, 65, a long-time Los Angeles lifeguard who through a series of fortunate events wrote and produced one of the most-watched shows in the history of television, bought the property on Las Flores Beach for just under $1 million in 1999, according to property records. He proceeded to build an architectural home inspired by his time as a lifeguard in Hawaii.

The home will hit the market on Wednesday with listing agent Diane Everett of Coldwell Banker Global Luxury.

The four-story beachside house has multiple decks and open-air spaces, including a grotto-style spa area and large entertainment deck, half of which boasts a sand floor, with TVs and an outdoor grill. The home was clearly built for a sun worshipper with numerous built-in loungers, firepits and ample storage for water sports equipment, according to the listing agent.

Inside, there are four bedrooms and four-and-a-half bathrooms. The open-floor plan has exposed wood ceilings, hardwood floors, varying ceiling heights and rows of built-in bookshelves.

Mr. Bonann’s work as a lifeguard took a turn into television when he happened to rescue the children of development executive Stu Erwin, Jr., TV production company MTM enterprises. Thanks to the chance encounter, the lifeguard pitched his idea for “Baywatch” —an action show about the lives and work of attractive Los Angeles lifeguards—to Erwin and TV exec Grant Tinker, a former chairman and CEO of NBC.

By 2001, the Guinness Book of World Records listed “Baywatch” as the most-watched show in the world with a weekly audience of more than 1.1 billion. It aired in 144 countries and was translated into 42 languages. The show ran from 1989 to 2001 and starred David Hasselhoff and Pamela Anderson.

Mr. Bonann previously listed his Malibu estate, including an additional, 2,600-square-foot residence, in 2010 for $18.5 million. He sold off the smaller unit in 2012 for $5.25 million, and is now looking to sell off the main mansion.